
                                                                     EXHIBIT 99



                                             Merrill Lynch,
                                             Pierce, Fenner & Smith Incorporated

                                             World Financial Center
                                             North Tower
                                             New York, New York 10281-1310
                                             212 449 1000


MERRILL LYNCH


July 17, 1998


General Motors Acceptance Corporation
3031 West Grand Boulevard
New Center One, Suite 695
Detroit, MI  48202

To Whom It May Concern:

We confirm that  Merrill  Lynch & Co.,  Merrill  Lynch,  Pierce,  Fenner & Smith
Incorporated,  an Underwriter for General Motors Acceptance  Corporation  Medium
Term Note Program (the "Program"), has acted in compliance with Rule 15c2-8 (the
"Rule") under the  Securities  Exchange Act of 1934,  as amended,  solely to the
extent the Rule is  applicable  in the  offering  of Medium Term Notes under the
Program.

Very truly yours,

MERRILL LYNCH, PIERCE, FENNER & SMITH
             INCORPORATED

By:  s/  Scott G. Primrose
--------------------------
Name:    Scott G. Primrose
Title:   Authorized Signatory

<PAGE>

SALOMON SMITH BARNEY

A Member of TravelersGroup


July 20, 1998


General Motors Acceptance Corporation
3031 West Grand Boulevard
New Center One, Suite 695
Detroit, MI  48202
Attention: Rick Buxton
Re: GMAC Debt Securities


Dear Sirs:

We confirm  that  Salomon  Brothers  Inc,  an  Underwriter  for  General  Motors
Acceptance  Corporation  Medium Term Note Program (the "Program"),  has acted in
compliance  with Rule 15c2-8 (the "Rule") under the  Securities  Exchange Act of
1934, as amended, solely to the extent the Rule is applicable in the offering of
Medium Term Notes under the Program.



                                                SALOMON BROTHERS INC

                                                By:  s/ Martha D. Bailey
                                                ------------------------
                                                Name:   Martha D. Bailey
                                                Title:  Vice President


<PAGE>

MORGAN STANLEY DEAN WITTER


                                                
                                                1585 BROADWAY
                                                NEW YORK, NEW YORK 10036
                                                (212) 761-4000


                                                July 16, 1998


Rick Buxton
General Motors Acceptance Corporation
3031 West Grand Boulevard
New Center One, Suite 695
Detroit, MI  48202


Dear Rick:

We confirm that Morgan Stanley & Co.  Incorporated,  an Underwriter  for General
Motors  Acceptance  Corporation  Medium Term Note Program (the  "Program"),  has
acted in compliance with Rule 15c2-8 (the "Rule") under the Securities  Exchange
Act of 1934,  as  amended,  solely to the extent the Rule is  applicable  in the
offering of Medium Term Notes Under the Program.


                                                Very truly yours,

                                                s/ Michael Fusco
                                                ----------------
                                                Michael Fusco
                                                Vice President


<PAGE>


                                 LEHMAN BROTHERS




July 20, 1998


Mr. Rick Buxton
General Motors Acceptance Corporation
3031 West Grand Boulevard
New Center One, Suite 695
Detroit, MI  48202

Dear Rick:

We confirm  that  Lehman  Brothers  Inc.,  an  Underwriter  for  General  Motors
Acceptance  Corporation  Medium Term Note Program (the "Program"),  has acted in
compliance  with Rule 15c2-8 (the "Rule") under the  Securities  Exchange Act of
1934, as amended, solely to the extent the Rule is applicable in the offering of
Medium Term Notes under the program.


                                                LEHMAN BROTHERS INC.

                                                By:  s/ Robert Swindell
                                                -------------------------
                                                Name:   Robert Swindle
                                                Title:  Managing Director












                                 LEHMAN BROTHERS
                   3 WORLD FINANCIAL CENTER NEW YORK, NY 10285


<PAGE>

                                                                     J.P. MORGAN




J.P. Morgan Securities Inc.
60 Wall Street
New York NY
10260-0060


July 20, 1998


General Motors Acceptance Corporation
3031 West Grand Boulevard
New Center One, Suite 695
Detroit, MI  48202


Ladies and Gentlemen:

Re:  General Motors Acceptance Corporation 415 Shelf Registration

We confirm that J.P. Morgan  Securities  Inc., an Underwriter for General Motors
Acceptance Corporation Debt Securities has acted in compliance with Rule 15c2-8
(the "Rule") under the  Securities  Exchange Act of 1934, as amended,  solely to
the extent the Rule is applicable in the offering of Debt Securities.


J.P. MORGAN SECURITIES INC.


By: s/  Margaret Brody
    ------------------
Name:   Margaret Brody
Title:  Managing Director





<PAGE>

BEAR STEARNS
                                                BEAR, STEARNS, & CO. INC.
                                                245 PARK AVENUE
                                                NEW YORK, NEW YORK 10167
                                                (212) 272-2000

                                                ATLANTA * BOSTON
                                                CHICAGO * DALLAS * LOS ANGELES
                                                NEW YORK * SAN FRANCISCO

                                                GENEVA * HONG KONG
                                                LONDON * PARIS * TOKYO



                                  July 17, 1998



Mr. David C. Walker
Director of Liability Management
General Motors Acceptance Corporation
3031 West Grand Boulevard
New Center One, Suite 695
Detroit, Michigan  48202


Dear Mr. Walker:

We confirm that Bear,  Stearns & Co. Inc., a dealer in General Motors Acceptance
Corporation  Medium Term Note Program (the  "Program"),  has acted in compliance
with Rule 15c2-8 (the "Rule")  under the  Securities  Exchange  Act of 1934,  as
amended,  solely to the extent the Rule is  applicable to the offering of Medium
Term Notes under the Program.


                                                Very truly yours,


                                                By:  s/ Paul M. Friedman
                                                ------------------------
                                                Name:   Paul M. Friedman
                                                Title:  Senior Managing Director



<PAGE>



WARBURG DILLON READ



General Motors Acceptance Corporation
3031 West Grand Boulevard
New Center One, Suite 695
Detroit, MI  48202

July 17, 1998


Attention:  Rick Buxton


General Motors Acceptance Corporation Medium Term Note Program

Dear Sir:

We confirm  that  Warburg  Dillon Read LLC, an  Underwriter  for General  Motors
Acceptance  Corporation  Medium Term Note Program (the "Program"),  has acted in
compliance  with Rule 15c2-8 (the "Rule") under the  Securities  Exchange Act of
1934, as amended, solely to the extent the Rule is applicable in the offering of
Medium Term Notes under the Program.


                                                WARBURG DILLON READ


                                                By: s/  Michael P. Hynes
                                                ----------------------
                                                Name:   Michael P. Hynes
                                                Title:  Authorized Signature



